Where's the hype for the new MMU 2.0?  

Re: Where's the hype for the new MMU 2.0?

I am surprised with about 10,000 back orders and the amount that has shipped we do not have half a dozen or more MMU 2.0 videos from the rank and file. The regular U-Tubers probably have a production schedule but I would say the MMU 2.0 is Gold for ratings and hits. Who cares about another Chinese printer or filament review compared to the MMU 2.0. It isn't like there are a whole lot of options for multi material printing.
Prusa is firstest with the mostest right now and will claim that space for the foreseeable future.

Re: Where's the hype for the new MMU 2.0?

I am surprised with about 10,000 back orders and the amount that has shipped we do not have half a dozen or more MMU 2.0 videos from the rank and file.

Considering the number of vids from previous launches, it is indeed surprising.

Re: Where's the hype for the new MMU 2.0?

Considering the number of vids from previous launches, it is indeed surprising.

Yup, which is making me feel like something is amiss.

Re: Where's the hype for the new MMU 2.0?

I am surprised with about 10,000 back orders and the amount that has shipped we do not have half a dozen or more MMU 2.0 videos from the rank and file. The regular U-Tubers probably have a production schedule but I would say the MMU 2.0 is Gold for ratings and hits. Who cares about another Chinese printer or filament review compared to the MMU 2.0. It isn't like there are a whole lot of options for multi material printing.
Prusa is firstest with the mostest right now and will claim that space for the foreseeable future.

Perhaps nothing to rant about this time?

Re: Where's the hype for the new MMU 2.0?

Joe (3DMN) did have his now.

I expect some videos next week.

Re: Where's the hype for the new MMU 2.0?

Joe (3DMN) did have his now.

I expect some videos next week.

Awesome, I trust Joe and I look forward to his first impressions. He takes a while to form a final opinion for a review, and I respect that.

Re: Where's the hype for the new MMU 2.0?

Here's some hype (home brew MMU2). Not really hype, just a real print (22 hour at 200%) and another one at 100% scale (8 hours). I built the MMU2 from scratch (arduino mega with RAMPS 1.6 board and then wrote my own firmware for the MMU2). My code base and hardware approach are open source ( https://github.com/cskozlowski/mmu2 )

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Re: Where's the hype for the new MMU 2.0?

Here's some hype (home brew MMU2). Not really hype, just a real print (22 hour at 200%) and another one at 100% scale (8 hours). I built the MMU2 from scratch (arduino mega with RAMPS 1.6 board and then wrote my own firmware for the MMU2).

.Sphinx (4 color).jpg

mmu2 color prints.jpg

Found Josef's alt account.

Re: Where's the hype for the new MMU 2.0?

Well played ... 🙂

Re: Where's the hype for the new MMU 2.0?

Chuck - pretty cool! Is your setup the same as Prusa's? The idler seems like the weak link in their design. Interested in your setup.

Re: Where's the hype for the new MMU 2.0?

Chuck - pretty cool! Is your setup the same as Prusa's? The idler seems like the weak link in their design. Interested in your setup.

The idler has worked quite well for me but i wrote my code from scratch so there are things I do for 'idler management' that Prusa might not do or just do differently. The biggest technical issue has been making certain that the filament is getting ALL the way to the bondtech gear - I use a 2nd sensor that I added on top of the mk3 extruder to guarantee this happens for every filament load. There is a piece of PTFE (1.85mm ID) that is essential to properly formed filament tips for filament extraction. I couldn't find any 1.85mm ID PTFE in the wild but I did find some 1.80mm PTFE and it has been working quite well for me - I don't have any jams during a filament unload. I documented all of these issues and more on my github site. I believe the proof in the pudding is real-world multicolor prints so that is why I included them. Here are my deltas from a stock PRUSA MMU2:

1. Festo Coupler at the MMU2 - used a 10mm straight through coupler (required new design for the coupler)
2. FIlament Cover on the MK3 - extensively modified to accomodate the microswitch and 7mm ball bearing for filament detection
3. Arduino Mega 2650 + RAMPS 1.x board w/ home-brew firmware (code is avialable at https://github.com/cskozlowski/mmu2 )

I also do a very aggresive ''filament load' in my firmware where I match the speed of the MMU2 extruder to the MK3 extruder for 1.6 seconds at 30mm/sec. (over 45mm of filament are loaded past the bondtech gear). This means I NEVER have a filament load issue and I have ZERO grinding since I match the speeds of both gears exactly. I did not change the MK3 firmware since Slic3r allows the user to set the filament load speed when slicing and and then generating the gcode.

Re: Where's the hype for the new MMU 2.0?

1. Festo Coupler at the MMU2 - used a 10mm straight through coupler (required new design for the coupler)
2. FIlament Cover on the MK3 - extensively modified to accomodate the microswitch and 7mm ball bearing for filament detection

Do you have links to the designs for these two?

Re: Where's the hype for the new MMU 2.0?

1. Festo Coupler at the MMU2 - used a 10mm straight through coupler (required new design for the coupler)
2. FIlament Cover on the MK3 - extensively modified to accomodate the microswitch and 7mm ball bearing for filament detection

Do you have links to the designs for these two?

They were just added to my github site (STL file format).

Re: Where's the hype for the new MMU 2.0?

They were just added to my github site (STL file format).

Thanks! Do you think I could use the provided MMU2 steppers with your homebrew version? Thinking the overall cost to try yours would be significantly reduced by using the parts from the kit.

Re: Where's the hype for the new MMU 2.0?

They were just added to my github site (STL file format).

Thanks! Do you think I could use the provided MMU2 steppers with your homebrew version? Thinking the overall cost to try yours would be significantly reduced by using the parts from the kit.

If you are thinking about using the existing MMU2 stepper motors - the short answer is yes. They need to be 200 steps/revolution motors with at least 45 N-cm of stall torque. If you already have these motors then you are in good shape.

Re: Where's the hype for the new MMU 2.0?

Hello @ all,

this is my first post in this forum, i have a Prusa I3 MK3 due to the long delivery time/backorder log of the mmu2 i did not Order it yet by prusa i had already one from a friend which i could test, i saw a lot of incomplete engineering there, so i started to improve parts for it. I sent everything of that to the prusa research team, the answer was i should publish it at thingiverse ( https://www.thingiverse.com/thing:3232029 ) which i did, including a Bill of material as well as links where you can buy the parts. Also you can find a tool there for the mmu2 pfte-tube

kind regards

joe

Re: Where's the hype for the new MMU 2.0?

I sent everything of that to the prusa research team, the answer was i should publish it at thingiverse ( https://www.thingiverse.com/thing:3232029 ) which i did, including a Bill of material as well as links where you can buy the parts. Also you can find a tool there for the mmu2 pfte-tube

Hello Joe and welcome to this community. First of all thank you for the contribution. I've looked at the stl files but it's hard to see what kind of improvements were done. It will be great if you could describe in a little bit more detail what kind of changes you've done to the parts. Maybe you could also publish the scad files, so it's easier to compare.

Re: Where's the hype for the new MMU 2.0?

Dear Nikolai,

first of all a do not have SCAD files, because all my components are made with Inventor so that there are ipt and iam files. But i will describe the parts more in deep

mmu2-rear-PTFE-holder_v2 has been modified, so you can Tap a M5 and screw QSM or Festo Push-Fits inside, so you don't need anymore to clamp the PTFE-tube from the Filament Spoolers to the mmu main-unit, in case of filament jam you easily detach the PTFE-tube by pressing the push-fit

mmu2-blade-holder_v2 and mmu2-selector-finda_v2 has been modified so that the cutter-blade has a better fixation. Also the use of a 7.935mm V2A F.I.N.D.A Ball has been optimized so the Ball doesn't stuck anymore.

mmu2-pulley-body the hings has been reinforced because they were to tight and cracking when you have pressed in the bearings.

mmu2-ele-cover and mmu2-idler has been repaired due to errors when trying to print "object has open shapes/areas). I have repaired it with the Netfabb Online Service.

all other parts has only been optimised for printing so everything can be printed without support now. The Prusa print recommendation should not be used. I have got the best result with PETG with 0.150 mic. with 30% infill (Honeycombs where every 5fth layer was connected) hotend at 1st Layer 235C and the other and 240C the Bed 1st Layer 90C all other 85C i did not have any warping i was using a Prusa I3 MK3 with a double side coated PEI metal sheet. I also used the original Prusa PET Filament.

I hope this helps you to get a better picture about.

kind regards

Joe